<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <title>Document</title>
    <style type="text/css">
        .grid {
            margin: auto;
            width: 530px;
            text-align: center;
        }
        
        .grid table {
            border-top: 1px solid #c2d89a;
            width: 100%;
            border-collapse: collapse;
        }
        
        .grid th,
        td {
            padding: 10;
            border: 1px dashed #f3dcab;
            height: 35px;
            line-height: 35px;
        }
        
        .grid th {
            background-color: #f3dcab;
        }
        
        .grid .book {
            padding-bottom: 10px;
            padding-top: 5px;
            background-color: #f3dcab;
        }
        
        .grid .total {
            height: 30px;
            line-height: 30px;
            background-color: #f3dcab;
            border-top: 1px solid #c2d89a;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="grid">
            <div>
                <h1>图书管理</h1>
                <div class="book">
                    <div>
                        <label for="id">
                编号：
              </label>
                        <input type="text" id="id" v-model="id" v-bind:disabled="isFlag" v-focus />
                        <label for="name">
                名称：
              </label>
                        <input type="text" id="name" v-model="name" />
                        <button @click="addbook" v-bind:disabled="subFlag">提交</button>
                    </div>
                </div>
            </div>
            <div class="total">
                <span>图书总数：</span>
                <span>{{total}}</span>
            </div>
            <table>
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>名称</th>
                        <th>时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="item in books" :key="item.id">
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>
                        <td>{{item.date | format('yyyy-MM-dd hh:mm:ss')}}</td>
                        <td>
                            <a href="" @click.prevent="change(item.id)">修改</a>
                            <span>|</span>
                            <a href="" @click.prevent="del(item.id)">删除</a>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
    <script type="text/javascript" src="../vue.js"></script>
    <script type="text/javascript">
        Vue.directive('focus', {
            inserted: function(el) {
                el.focus();
            },
        });
        Vue.filter('format', function(value, arg) {
            function dateFormat(date, format) {
                if (typeof date === 'string') {
                    var mts = date.match(/(\/Date\((\d+)\)\/)/);
                    if (mts && mts.length >= 3) {
                        date = parseInt(mts[2]);
                    }
                }
                date = new Date(date);
                if (!date || date.toUTCString() == 'Invalid Date') {
                    return '';
                }
                var map = {
                    M: date.getMonth() + 1, //月份
                    d: date.getDate(), //日
                    h: date.getHours(), //小时
                    m: date.getMinutes(), //分
                    s: date.getSeconds(), //秒
                    q: Math.floor((date.getMonth() + 3) / 3), //季度
                    S: date.getMilliseconds(), //毫秒
                };

                format = format.replace(/([yMdhmsqS])+/g, function(all, t) {
                    var v = map[t];
                    if (v !== undefined) {
                        if (all.length > 1) {
                            v = '0' + v;
                            v = v.substr(v.length - 2);
                        }
                        return v;
                    } else if (t === 'y') {
                        return (date.getFullYear() + '').substr(4 - all.length);
                    }
                    return all;
                });
                return format;
            }
            return dateFormat(value, arg);
        });
        var vm = new Vue({
            el: '#app',
            data: {
                isFlag: false,
                subFlag: false,
                id: '',
                name: '',
                books: [],
            },
            methods: {
                addbook: function() {
                    if (this.isFlag) {
                        this.books.some((item) => {
                            if (item.id === this.id) {
                                return (item.name = this.name);
                            }
                        });
                        this.isFlag = false;
                    } else {
                        let book = {
                            id: this.id,
                            name: this.name,
                            date: new Date(),
                        };
                        // 使用 变更方法更新数据，更新视图
                        this.books.push(book);
                    }
                    // 重置输入框
                    this.id = this.name = '';
                },
                change: function(id) {
                    this.isFlag = true;
                    var book = this.books.filter(function(item) {
                        return item.id === id;
                    });
                    console.log(book);
                    this.id = book[0].id;
                    this.name = book[0].name;
                },
                del: function(id) {
                    // var index = this.books.findIndex(function(item) {
                    //     return item.id == id;
                    //     // console.log(item.id === id);
                    // });
                    // // console.log(index);
                    // this.books.splice(index, 1);
                    this.books = this.books.filter(function(item) {
                        // console.log(item);
                        return item.id != id;
                    });
                    // console.log(this.books);
                },
            },
            computed: {
                total: function() {
                    return this.books.length;
                },
            },
            watch: {
                name: function(newName) {
                    var flag = this.books.some(function(item) {
                        return item.name === newName;
                    });
                    this.subFlag = flag;
                },
            },
            mounted: function() {
                var data = [{
                    id: 1,
                    name: '三国演义',
                    date: new Date(),
                }, {
                    id: 2,
                    name: '水浒传',
                    date: new Date(),
                }, {
                    id: 3,
                    name: '红楼梦',
                    date: new Date(),
                }, {
                    id: 4,
                    name: '西游记',
                    date: new Date(),
                }, ];
                this.books = data;
            },
        });
    </script>
</body>

</html>